In the Ultimatum Game,anthropologists Found That Among Foragers

In the ultimatum game,anthropologists found that among foragers:

A) the rules of the game changed,as foragers did not understand how to play.
B) economics is always based on generosity.
C) although there was greater equality socially in the society,the players were not generous economically.
D) although there was social inequality in the society,the players were very generous economically.
E) social and economic equality were always the same.